Paris Hilton shared adorable new snaps of her baby boy — proudly declaring that little Phoenix is her “whole heart.”

The hotel heiress became a first-time mom in January when she and her husband Carter Reum welcomed the little boy via surrogate.

The 42-year-old has gushed about her newfound motherhood ever since, and rushing to Instagram Monday, the “Simple Life” alum couldn’t help but share more snaps of the tot.

“My whole heart. #MommyMonday,” she wrote alongside a series of snaps showing her embracing the baby boy, born on January 16.

Among the waves of loving comments from celebs and fans alike, the DJ’s sister, Nicky Hilton, left a row of heart emojis.

Celebrity makeup artist Spencer Barnes wrote, “Awww I still remember you talking about wanting to be a mom one day on location filming The SL#5   Wow! I’m so happy to see your motherhood BOSS mom unfold! Bless your beautiful family.”

Paris last month revealed baby Phoenix’s face to the world in a series of sweet portrait pics published by Glamour UK.

“I’m so obsessed with my little angel and when he looks into my eyes, I just melt,” she told the outlet. “He’s such a good baby.”

Paris, who decided to keep her son’s arrival private from everyone until a week after he was born, recently opened up about the decision to be so secretive.

“I felt my life has been so public, I really wanted to keep it private,” she said. “Of course, it was hard not to tell anyone, because it’s such an exciting time. But I also loved being able to share this with just Carter.”

Just one day prior, Paris unveiled her son’s unique name and the touching meaning behind it.

“My beautiful baby boy’s name is Phoenix Barron Hilton Reum. And Carter and I are so proud to welcome him into the world,” she said on her “This Is Paris” podcast last month. “I’ve been planning my children’s names for years and years.”

Paris also explained the significance of his middle name, which honored her late grandfather, Barron Hilton.

“He was always my mentor, and I looked up to my grandfather so much, and we were so close, and I miss him every day, so I really wanted to honor him by having his name in my first son’s name,” she said.

Hilton and Reum started dating in late 2019, and the entrepreneur popped the all-important question in February 2021.

The pair tied the knot in a lavish 3-day wedding nine months later.